Process for preparing piperidines

US6458954B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Guido Giffels · Bonn, DE
• Herbert Diehl · Leverkusen, DE
• Georg Martin · Bocholt, DE
• Lutz Frohn · Erkrath, DE
• Erich Hammerschmidt · Bensberg, DE

Key dates

• Filing date: Apr 30, 2001
• Grant date: Oct 1, 2002
• Expiry date: Apr 30, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D211/60
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Piperidines are prepared in an advantageous manner by catalytic hydrogenation of activated pyridines in the presence of palladium catalysts if the palladium catalyst is palladium-on-carbon and the solvents are aromatic hydrocarbons.